Image construction from the IRAS survey and data fusion

Details Image construction from the IRAS survey and data fusion Image construction from the IRAS survey and data fusion

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9113381b&link_type=abstract

Presented at the Workshop on Restoration of HST Images and Spectra, Baltimore, MD, 21-22 Aug. 1990

Astronomy and Astrophysics

Astronomy

Data Processing, Galaxies, Imaging Techniques, Least Squares Method, Maximum Entropy Method, Spatial Resolution, Surveys, Diffraction, Infrared Astronomy Satellite, Nonuniformity, Signal To Noise Ratios

Scientific paper

The IRAS survey data can be used successfully to produce images of extended objects. The major difficulty, viz. non-uniform sampling, different response functions for each detector, and varying signal-to-noise levels for each detector for each scan, were resolved. The results of three different image construction techniques are compared: co-addition, constrained least squares, and maximum entropy. The maximum entropy result is superior. An image of the galaxy M51 with an average spatial resolution of 45 arc seconds, is presented using 60 micron survey data. This exceeds the telescope diffraction limit of 1 minute of arc, at this wavelength. Data fusion is a proposed method for combining data from different instruments, with different spatial resolutions, at different wavelengths. Direct estimates of the physical parameters, temperature, density and composition, can be made from the data without prior images (re-)construction. An increase in the accuracy of these parameters is expected as the result of this more systematic approach.

Affiliated with

Also associated with

No associations

Rating

Image construction from the IRAS survey and data fusion does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Image construction from the IRAS survey and data fusion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image construction from the IRAS survey and data fusion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1130155